Work clamp and template holder for hinge seat cutting



Aug. 5, 1952 F. SCHWARZER WORK CLAMP AND TE MFLATE HOLDER FOR HINGE SEAT CUTTING 4 Sheets -Sheet 1 Filed Feb. 6, 1948 INVENTOR} Fred Schwa HT ORNEY' A g- 1 F. SCHWARZER 2,605,789

WORK. CLAMP AND TEMPLATE HOLDER FOR HINGE SEAT CUTTING Filed Feb. 6, 1948 4 Shee ts-Sheet 2 INVENTOR, Fred fichwarger BY I 4 Sheets-Sheet INVENTOR,

araer F. SCHWARZER WORK CLAMP AND TEMPLATE HOLDER FOR HINGE SEAT CUTTING Aug. 5, 1952 Filed Feb. 6, 1948 TTORAiEY A g- 5, 1952 F. SCHWARZER 2,605,789

WORK CLAMP AND TEMPLATE HOLDER FOR HINGE SEAT CUTTING Filed Feb. 6, 1948 4 Sheefs-Sheet 4 105 L 0 104 l 104 1 107 1 B 106 109% 111 v0 g l 'I I113 i I 1255? l I K 10.5 g 100 v INVENTOR,

Fred Schwar er 102 92/0" -66 40 ATTORNEY Patented Aug. 5, 1952 WORK CLAMP AND TEMPLATE HOLDER FOR HINGE SEAT CUTTING Fred S'chwarzer, Pottstown, Pa., assignor to Warren B. Zern, Pottstown, Pa.

Application February 6, 1948, SerialNo. 6,686

This invention relates to an apparatus for clamping a door onto a stile of a door frame for cutting hinge seats. 7 e

An object of the invention is the provision of an apparatus for clamping a door to a stile of a door frame in such a manner that templates may be shifted and positioned in spaced relation along a bar of the device running the length of the stile in order that a workman may cut readily hinge-seats of the proper depth in both the stile and an edge of the door.

Another object of the invention is the provision of an apparatus for clamping a stile of a door frame to a door so that templates arranged along the device may be employed as guides for cutting hinge-seats in the door and stile, a bar running the length of the stile carrying the templates and a pair of clamps which are adapted to for securely the door to the bar while supporting and positioning the stile, a clamp carried by each template being adapted to press the stile against-the under face of a template holder. so that the stile will be held rigidly in place in the holder during the operation of forming the hinge-seats on. the stile and edge of the door.

A further object of the invention is the provision of an apparatus for clamping a door in an operative position on a stile of a frame for cutting hinge-seats in the stile and in an edge of the door, said apparatus including a metal bar running the length of the stile and provided with adjustable templates and clamping devices adapted to secure the door to the stile, each of the other clamping devices being suspended from a template holder and having a pivoted jaw engageable with the under face of the stile for forcingthe stile rigidly against the under face of the template holder, said jaw being carried by an arm which is pivoted on one end of a rotatable member, said member having pivotal connections with the lower end of a bracket or body supported by a template holder, a manually operated cam oscillating the rockable member for causing the jaw to adjust itself automatically for pressing the stiles against the template.

The invention consists in the novel construction, arrangement and combination of parts hereinafter more particularly described and claimed.

In the drawings:

Figure 1 is a longitudinal side view of an apparatus for clamping a door to a stile of a frame.

Figure 2 is a plan view of the complete clamping apparatus. 1 e t Figure 3 is a longitudinal opposite side view of the apparatus. I

Figure 4 is an enlarged fragmentary view of the side illustrated completely in Figure 3.

Figure 5 is an inner side view of a clamping device for holding the door in place on a supporting bar of the apparatus. 1 i

12 Claims. (Cl. 144-27) Figure Bis a view in perspective of the clamping device shown in Figure 5. 1 Figure '7 is an enlarged side view of a clamping device for forcing the stile in snug-engagement with the door and with the underface of a template holder. Figure Sis a transverse vertical section through the connected ends of a pair of sections of a longitudinal bar which supports the various elements of the apparatus.

Figure 9 is a fragmentary longitudinal hori- "zontal section through theconnections -shown in Figure 8.

Figure 10 is an enlargedjview in elevation of the connections shown in Figures 8 and 9 together with a supporting handle. i

Figure 11 is a view in perspective of the clamping device illustrated in Figure 7.

Figure-12 is a top plan view of a template holder with the template partly broken away.

Figure 13 is anenlarged fragmentary vertical section of the template holder and clamping means for the holder.

Figure 14 is an enlarged fragmentary side view of the supporting bar of the apparatus and the means for indicating the proper positionof the template holder, and

Figure 15 is a fragmentary side view with parts broken away to show an ejector for the door. Referring more particularlyto the drawings, 20 designates a longitudinal metal bar which'extends beyond the full length of the stile of a door frame. The bar is formed of two or more sections connected together by interfitting portions shown in Figures 8 and 9. The adiacent ends of the sections are each provided with an integrally formedsleeve 2| or 2l-a'. '.An' end 22 of a bar 23 rectangular in cross section is split at 22-a and is received by the rectangularly sha ed sleeve 2! of one section of the bar. other end 24 of the connecting bar 23 is received by the sleeve 2I-a on the other section of the bar 26. Bolts 25 connect the sleeve Zl-a. with the bar 23'while a bolt 26 received by passages in the, sleeve 2I' and't e end 22 of thebar'23 is threaded into a nut 21 set in a pocket between the spit portions of the bar. The nut is held against rotation by a lug 28 on the nut and disposed between the split portions of the bar.

A collar 30 is received by the bar 23 andv disposed in abutting relation with the free-ends of the sleeves 2|. and 2l-a. A bolt 3| not only secures the collar in place but attaches a block 32to the collar (Figures 8, 9'and 10). A'lip 33 engaging one face of the sleeve 2| prevents turning of said block. A handle 34 has ,a flattened end 35 received by a socket formed in the outer end of the block 32. A bolt 36 secures-the handle in place. It'will be noted in Figures 1 and '2 The that two handles are provided for lifting the bar 20 and the instrumentalities mounted there- A clamping; element at each: endyofi the.- bar 20 and designated generally by the letters C and C-l is employed for attaching a door D (Fig. 2) to the bar temporarily. The clamping elements have substantially the same construction except .for the reversal of parts to provide a left-hand Each -pa-ssage in the flange 41 has. its .inner Endt'Secured-rigidly to. the-movable jaw 45.v A-nut 49 is; threaded ontheouter 'endtot. themed-and a coil spring 50 on the rodandlocated "between-the nut-49- and the flange-41-tends-at all times to 'move-thernut outwardly from the flange 4'1 and the jaw 45 toward said flange. 1 An'operating meansfor the jaw-'-45 includes an arm 5 1 having a yoke- 52'received' by ana-nnul-ar groove 53 in thenutflh The arm is-pivotedat 54' on a cam 55 projecting from; the lower end of a lever 56. The intermediate-portion or the amp is; pivoted at 5'! on abracket 58: secured to theout-er face-oi" the flange 41'. When the; lever i5fiirisarockeddownwardly'-(F-ig-. .5), as indicated by the: arrow, the lowenend; of the arm '51. is moved outwardly by the camq55t so that the; nut and rod: 4-8,- are: moved (inwardly; causing the"; 'jaw toclamp the door D,3Fig 6, againstthe: flange 416i for retaining.- the ban 2.0"11', the; doom;

A rest 60 is secured rigidly to the flanged! and extends? inwardly: from the body 441 of? the clamping element. Since a clamping; element'is located at each end of the bar 20, the rests '60 provide-.a support forther 'ends'of the stiles. of a ddoniframez The stile-is properly positioned on said rest. a manner which. Will be explained presently;

A: gage; membengeneraily indicated: by' the: let.- .teriGis adapted torbe; received by a: transverse grooverfiil ati'the endiof a stile; (Fig. *2). Each .gagezmember (Fig. 6D inclndesaa: leaf G'Fpivoted on: 'arp'm; '63 carried byia'bearingr 6 $v rising from 'aplate: 6 secured to the top: ofv the: body 40 'of each clampingfmem'beri'C: andC- l. The: free: end of the leaf has: a: right-angular flange 68 upon which is mounted. a slide; 61". Therslide has a reduced? portion: 68 riding. in a. cuteout portion "esmthe flange 66: A bolt "Hi received: by" a slot 11 in the slide and: is' threaded: into: a: passage in the flange'fi'd for'retaining the slide: and anl outwardly projecting finger121in=a2 predetermined position. When. the bolt is loosened; a set-screw 'lfiri'n aflateralextension140i theslid'e bears against the adjacent: end of theflange. 68 for adjusting theslide. horizontally; A finger 1 5 has itsinner end pivoted on the slide att'he inner end of the stationary: finger 11". Finger pieces-16 and Tronthe respective fingers-"Wand le -permit the workman to force" the fingers toward each other so} that. said fingers may: be received bythe groove 61 in the stile. A spring 18' has arms pressingagainst the fingers 1-2 and id for maintainingth'e freeend of finger away from the finger 12 so that said fingers will exert pressure against the sides of the groove 6! to retain thefingers in thegroovev r Template holders are, spaced. along the bar 20 (Fig; 2) and are preferably secured thereto. Each holder consists of .a rectangular metal frame 8| having a depressed seat to receive neatly a template 82-. Theframe must have an opening 83 of greater dimensions than the opening 84 in the; template (Figures 12 and 13) since the dimensions of the opening in the template will vary in accordance with the kind of work to be done; Furthermore, the opening in the template o'fi center with the narrow side edge 85 of the template being located; inwardly (Fig. 2). This narrow side portion may be placed outwardlytcward-the bar: 20 when-necessary A sembcircular flange 8B depends from the, underface ofthe frame 8| (Figures 1. and: 13),,and has. a horizontalgroove Bil adaptedto-receive the bar 20. Aclamp=88 has an enlarged lower end 89 adapted to fit'into.-a.slot 90 in thelower end of the flange 86. A bolt? 94 threaded into a passage in the flange 86- and received loosely by a passage, in the clamp: 88 has a wingedhead 92 for turning the bolt to tighten or 1005311117116 clamp. A rod 93 has areduced" inner end 94'. threaded into a passage in; the inner side bar '95 of-the'tem-plate holder 80 (Fig. 12). A set screw 95; retains: the

rod' in, place.

In' Figure 14 is illustrateda mean-s for'properly positioning the template holders; The-bar at-the outer; face is; providedwith graduations, I00- and a pointer 1 0:] is pivotedon the clamp 88' and is adapted to ridezover thegraduationsz. The operator can vdeterminetjustwhere. to pOSitlOILthBIfiGI plate holders in. accordance with the lengthaof the door;.thepos'itions being;calculated-previously andzindic'ated on a chartc.

A collar 02 embraces th'e bar 2!) at pointsza'long said bar where. the holders '80 are tov be. positioned These collars. have. a loosezmember I03 which: is tightened against fthe bar 20: by set screws m4; the-heads of which. projectoutvrardly from the face of thememb'er 03.

A rockab1eimember fee has adepending catch Hi6 at each end. One of said: catches is adapted to engage the head of the set screw 154 for 'aiding' in preventing 'sliding movementorthetemplate holder '80. The: member Iiila is pivoted at H11 on the outer side portion I08 ofthe template frame '81. A- bolt 109' havinga head ilTY-i's threadedinto a passage for medin the bottom of the side member I 68 of the frame 81'. A plate I'll has a central opening received by th'ebolt I69; A coil' spring H! on the-bolt is engaged between the head ill! of the bolt and thepiate IH 50- that the spring and plate will tend" to maintain the rockable member I65 in a horizontal position. I

A particular form of clamping device is providedfor not only retaining the stile in position under the templates but for forcing'the stile into rigid contact with the door and at right angles to said door; Such clamping device is illustrated in Figures 7 and" 11 andincludes a main frame or fiat body H5 suspended from the rod 93 projecting from the rear of the template holder 80 by spaced hangers 6' which receive neatly the rod 93. A collar H1 secured adjustably tosaid red by a set screw H8 is disposed between the sleeve-like hangers H6 for retaining the body in an adjusted position on the rod 93.

A rockable member or crank I20 is pivoted on a pin l2! carried by a subframe or saddle [2-2 which straddles the member I20. Thelower end of the body II5 has an opening I23 which forms a pocket for the head of a pin I24 which passes through a bar I25 bolted to the lower end of the body. Saidpin is threaded at its lower end into a vertical passage in the top of the saddle I22. A stop I26 is secured to the saddle and is adapted to engage the bar I25. By this construction, the body'I'I5 may be rotated on a vertical axis from the position shown in Figure 7 to the dotted line position illustrated in Figurell for a purpose which will be presently explained. The stop I26 will retain the body in either position.

A jaw I30has its upper edge provided with teeth I3I for engagement with the under face of thestile S (Fig. 7). Said jaw is pivoted at I32 on the upper end of a bolt I33 threaded into a nut I34 which is rotatable upon the upper end of a sleeve I35. A set screw I36 is mounted radially in'the nut and has its-free end projecting into an annular grooVe I31 in the upper enlarged end of the sleeve I35. This construction permits an upward or downward movement on the bolt. A set screw I38 mounted radially in the sleeve I is adapted to engage the bolt I33 and prevent movement thereof after the proper position of the jaw I30 has been determined for the wo-rk'encountered. The lower end of the sleeve is provided with spaced ears I40 pivoted at I4'I on the inner end of the rockable member I20. A spring I42 secured to the member I20 passes between the ears I40 and pressesupon the lower end of the sleeve I35 for retaining said toe I43. A V-shaped spring I43 has a coil I43 at its apex housed Within the lever I44. .One leg of said spring presses against the bridging portion of the .U-shaped lever I44. A cam lever IE0 is pivoted at I5I on the lower end of the lever I44; A cam I52 on the lower end of the lever I is adapted to engage the outer end of the rockable member I20 for causing rocking of said member and for causing shifting and rocking of the lever I44. A coil spring I53 between one end of the saddle I22 and the rockable member I20 aids in returning said rockable member toan inoperative position after the cam I52 hasbeen moved away from the outer end I54 of the member I20.

The cross head I46 (Figures 7 and 11) is rigidly attached to the outer ends of a pair of arms I55 which embrace opposite sides of the body H5. The inner ends of said arm are rigid witha jaw or presser foot I55 disposed at right angles to the-body I I5. A coil spring I51 seated in a pocket I58 in the body presses outwardly against the cross head I48 tending to move the foot I 55 against the inner vertical edge of the body H5.

Said cross head is provided with a vertical groove I60 (Fig. 11) in which the roller I45 rides so that when the lever is oscillated the cross head will be forced inwardly while the presser foot or jaw will engage the side edge of the stile S and force thestile into rigid contact with the door D.

Each clamping device C and CI has an ejector for the door after the operation of the cutting of the hinge-seats has been completed. This ejector (Figs. 6 and 15) includesa presser foot I6I projecting through an opening I62 in a fiat end wall I63 of the body 40 of each of the clamping devices. It willbe noted that the foot is in the shape of a'cam having an inclined face with thethicker' portion of the cam being located at the top? The foot is secured to a plunger I64 slidably mounted in a barrel I65 projecting at right angles from'the body 40. A coil spring I 66 between the foot I6'I and the closed end I61 of the barrel I65 tends to force the foot IBI outwardly from the wall I33 of the body40. A cam I63 pivoted at IEO on the outer projecting end of the plunger I 34 is adaptedt-o coact with the closed end when operated by a lever I10 for withdrawing the foot I6I within the opening I62. At this time, said lever has been moved to a position which is diametrically opposite that shown in Figure 15; I

The operation of my device is as follows:v The door D is placed-on a support so that one longitudinal edge may be received by brackets (no-t shown) for retainingsaid door in a vertical position'. Thebar 20 upon which the various instrumentalities :arev supported is carried by the handles 34 and placed over the upper edge of the door.- At this time the levers I70 of the clamping devices C and 0-! are in the upper vertical positions for withdrawing the presser feet IIiI so that the opposite ends of the door will be received by the space'between the flange 45 and the movable clamp 45 of each clamping device. The clamping devices are adjusted along the bar 20 so that the ends of the door will be in abutting relation with the end wall I63 of each clamping device. tight so that the plates 42 will'secure the clamping devices in position on the bar 23. I

The 7 template holders are next adjusted along the bar 20 and fixed in place by the clamp 88 (Fig. ,14) after said holders have been properly positioned in accordance with the pointer IOI and the scales I00. The holders will then be disposed over the upper longitudinal edge of the door. Two holders are employed normally but the third holder is used when a third hinge is required for heavier doors. The sleeves I02 are clamped in place adjacent each holder so that one of the catches I06 may engage a head of a bolt lIl i for retaining the holders in adjusted The stile S is properly positioned with respect to the door D by the gage members G carried by the clamping devices C and C-I. The springpressed'hinged finger I5 is moved into engagement with the stationary finger I2 of the gage. The. stile is shifted along the supports 30 until the transverse groove BI therein is positioned below the fingers'which have been swung out of the way on the pivot 03. The leaf 62 is then lowered so that said fingers may be placed in the groove El and released and finger 15 will move against one wall of the groove while the stationary finger Ii will contact the other wall. The stile, when both gages are in operative relation in the grooves 'Gl at the opposite ends of the stile will be ready for the application of the clamping devices shown in Figures 7 and 11.

The stile S is now placed upon the brackets 00 (Figures 5 and 6) and moved into engagement with the door. The stile-clamping and positioning members shown in Figures 7 and 11 are operated next. The stile (Figure 7) is disposed above The bolts 44- (Fig; 5) are screwed up the rockable clamping elements I30, When the lever I50. is moved downwardly the roller I45 presses against the cross head M6 forcing the .clamp I55 horizontally against the outer longitudinal edge of the stile for forcing the inner dge of the stile against the door. At the same time, the jaw I30 is moved upwardly at substantially right angles to the horizontal movement of clamp I56 by the inner end of the member I20 which is rocked by the cam I52 on the lever 1.50.. Since the jaw not only oscillates on the sleeve I35 but is also oscillated by the sleeve, said jaw will move upwardly into gripping relation with the under face of the stile and will not only force the stile against the under face of the template holder but will force the stile inwardly in cooperation with the press'er foot I55 to cause the stile to contact the door firmly so that no space will be left between the door and stile. The movement of the operating lever I50 from its full-line position in Fig. 7 to its broken-line position moves the cam surface I52 from a position below the pivot II in the disengaged position of the clamping assembly to a position above the pivot I5I in the engaged or clamping position. This over-center movement of the operating lever I59 reverses the direction of application of the force of the spring I51 on the operating lever I50 to hold the clamping assembly in the clamping position.

The operator will cut out the hinge seats with the proper tools and will be guided by the rectangular openings in the selected template. When the seats have been completed, the levers I50 (Fig. 7) will be released so that the stile may be removed. The levers 56 (Figs. 5 and 6) are raised while the levers IIII are lowered to the positions shown in Figures 6 and 15. This last action causes the feet IBI to press downwardly on the opposite ends of the door whereby the bar 28 will be raised from said door.

The templates may be changed to suit the type of work done. In other words, a template may be employed for directing the operator in forming mortices or gains in the edge of the door to receive the look. A template may also be used for cutting a socket in the stile for the reception of the bolt of the lock.

vAs has been stated, the clamp device shown in Figures 7 and 11 may be rotated to a right angular position so as to facilitate removal of the stile ,3.

While I have shown and described a preferred construction of the device, this is by way of illustration only, and I consider as my .own all such modifications in constructions as fairly fall within the scope of the appended claims.

I claim:

1. In a device of the class described, a. longi- .tudinalsupporting bar, means on the ,bar adapted to clamp a door onto the bar, a template holderconnected to the bar, means for clamping a stile at right angles to-a longitudinal edge of the door comprising a body member suspended from the holder, at rockable member pivoted intermediate the ends thereof on the lower end of the body member, a movable jaw mounted on one end of the rockable member adapted to engage the underface of the stile, a cam, an operating lever projecting from the cam and means pivotally mounted on the other end of the rockable member for pivotally supporting the cam in close association with the said other end of the rockable member for causing rocking of said member and for forcing the jaw inwardly towards the bar and also upwardlyto clamp the stile against the door and template holder. I

2. In a device of the class described, a longitudinal bar, means .on the 'bar adapted to clamp a door onto the bar, a template holder projecting laterally from the bar, means for clamping a stile at right angles to a, longitudinal edge of the door comprising a body member swingably supported from the holder, at rockable bar mounted on the body member, a rod pivoted on one end of the bar and rising vertically therefrom, a jaw pivoted on the upper end of the rod and engageable with the under face of the stile, a cam engaging the other end of the rockable bar, means bearing against the body and having pivotal connections with the second-mentioned end of the rockable bar, and means pivotally connecting the cam with the last-mentioned means so that when the cam is actuated the bar will be rocked for causing the jaw'to force the stile not only against the under face of the holder but to force an edge of the stile against the door.

3. In a device of the class described, a longitudinal bar, means 011 the bar clamping a door thereto, a template holder carried by the bar, means clamping a stile at right angles to an edge of the door comprising a body member depending from the holder, a clamp slidable in the body and adapted to retain the stile against the door, a rockable member swingably supported on the body, a clamping element having limited oscillating movement on one end of the rockable member and engageable with the under face of the stile for forcing said stile against the door and holder, operating means between the other end of the rockable member and the slidable clamp and. means actuating the operative means for causing simultaneous movements of the slidable clamp and the clamping element.

4. In a device of the class described, a longitudinal bar, means on the bar clamping a door thereto, a template holder carried by the bar, means clamping a stile at right angles to an edge of the door comprising a body member depending from the holder, a clamp slidable in the body and adapted to retain the stile against the door, a rockable member swingably supported on the .body, a clamping element having limited oscillating movement on one end of the rockable member and engageable with the under face of the stile for forcing said stile against the door and holder, an arm pivoted on the other end of the rockable member and having a free end acting on the slidable clamp, a cam pivoted on the arm and engaging the second-mentioned end of the rockable member and a lever for rocking the cam so that the cam will cause simultaneous actuation of the arm and rockable member and the clamp.

5. In a device of the class described, a longitudinal bar provided with a scale along one face,

means on the bar for clamping a longitudinal edgeof a door on to the bar in predetermined relationto the scale, a template holder adjustable on the bar relative to the scale, means clamping the holder in a horizontal position over the edge of the door, means carried by the holder for applying clamping pressure to a longitudinal edge of a stile to clamp the opposite edge thereof in rigid contact with the door and for simultaneously applying clamping pressure to a face of the stile to clamp the opposite face thereof against the underface of the holder, a pointer on the clamping means cooperating with the scale for indicating the position of the holder for cutting hinge seats in the door and stile, a projection on V ing a flange adapted to engage one face of the' door, a movable clamp engageable with the opposite face of the door, means-for tightening said clamp, a support projecting from said body member for supporting a stile horizontally so that the upper face of the stile will be flush with the longitudinal edge of the door, and fingers carried by said body member for positioning the stile relative to the adjacent end of the door.

7. In a device of the character described, a longitudinal bar, spaced means for clamping a longitudinal edge of a door to the bar, each clamping means comprising a body member having a flange adapted to engage one face of the door, a movable clamp engageable with the opposite face of the door, means for tightening said clamp, a support projecting from said body member for supporting a stile horizontally so that the upper face of the stile will be flush with the longitudinal edge of the door, fingers carried by said body member for positioning the stile relative to the adjacent end of the door, said body member having a slot, a toe having a cam face pivotally mounted in the slot and adapted to engage an end of the door, and a lever connected to the toe for rocking the toe to eject the door from the body member when the movable clamp has been released. 7

8. In a device of the class described, a longitudinal bar, spaced means on the bar for clamping a door to the bar, each means including a body member having a vertical channel therein to receive an end of the door, the channel being defined by a rigid end wall, a rear wall and a movable wall forming a clamping element, means for tightening the clamping element, the end wall having a slot, a cam carried by said body member and disposed within the slot, and a lever connected to the cam for projectingthe cam from the slot to engage the end of the door for forcing the door from the channel, when the clamping element has been released.

9. In a hinge jig assembly for a stile and a door, means including a clamping assembly for clamping the stile against the door in position for a routing tool to be guided with respect to the stile and the door, said means including a frame member engaging the door and having a support extending over and above the stile, said clamping assembly comprising a body member depending from said support in spaced relation with the door and the stile, a clamping member slidable relative to said body member for moving the stile into clamping position against the door, a crank pivoted intermediate its ends from said body member, one end of said crank forming a clamping element movable upwardly into engagement with the stile for pressing it against the frame support disposed thereabove, means including an operating lever having a cam surface movable relative to said crank and operatively associated with said slidable clamping member for first rotating said crank in a direction to lift the clamping element and the stile until brought to a standstill against said overlying frame support and for thereafter moving said slidable member against the stile to press it tightly against the door, a spring for opposing the clamping movement of said operating lever, the pivotal support of said operating lever being disposed with respect to said cam surface for movement of said cam surface from a position below said support in the disengaged position of said clamp ing assembly to a position above said support in 'thevclamping position to reverse the direction of application of the force of the spring on said operating lever to hold said clamping assembly in the clamping position.

10. The combination set forth in claim 9 in which said body member of said clamping assembly includes a main frame and a subframe,

said subframe being pivoted to said main frame of said body member for rotation of the crank arm, the operating lever and associated parts about a vertical axis for movement of the clamping element outwardly and awayfrom its stilesupporting position, said clamping assembly being rotatably mounted on said support for rotation of the clamping assembly as a whole about a horizontal axis upwardly and in spaced relation with the upper edge of the door.

11. A clamp for woodworking apparatus comprising a body member having a slidable jaw, a rockable member pivotally secured intermediate its ends to said body member and in spaced relation with said jaw, said rockable member pivotally carrying at one end a clamping element having limited oscillating movement, operating means between the other end of said rockable member and said slidable jaw, and means for.actuating the operating means for causing simultaneous movements of said slidable jaw and said clamping element, said movements being substantially at right angles to each other.

12. A clamping device comprising a body member, a clamp horizontally slidable relative to said body member, a rockable member, a saddle pivoted to said body member for pivotally supporting said rockable member, said rockable member having a clamping element pivotally carried by one end thereof and a handle pivotally carried adjacent the other end of said rockable member for moving said-rockable member into and out of its clamping position, said body member and said saddle having engaging stops for locating said rockable member in position at right angles to its clamping position, and means on said body member for bodily rotating said clamping device as a whole about a pivotal support.

FRED SCHWARZER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 710,544 Wandell Oct. 7, 1902 775,399 Halladay Nov. 22, 1904 897,641 Moses Sept. 1, 1908 1,140,243 Brimhall May 18, 1915 1,347,360 Anthony July 20, 1920 1,642,474 Willoughby Sept. 13, 1927 1,644,666 Carter Oct. 11, 1927 2,355,603 Zern Aug. 8, 1944 

